diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index b75062985e3..9a42fc4996d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -118,6 +118,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+        with:
+          submodules: recursive
 
       - name: Set up JDK 11.0.8
         uses: actions/setup-java@v1